The term â€œblogâ€ is slang for â€œweb log.â€ Wikipedia defines a blog as â€œa web site where entries are written in chronological order and are commonly displayed in reverse chronological order.â€ The word can also be used as a verb, meaning to maintain or add content to a blog. To get a feel for the wide use of blogs, consider the following: In September 2007, blog search engine Technorati tracked more than 106 million blogs. Some notable corporations that use blogs are HP, Google, Microsoft and ImageWorks Studio.